Main bearing



W. T. PRICE MAIN BEARING Filed Aug. '7 1920 I e b M m H! INVENTOR Wil ow 1% ATTORNEYS Patented May 1, 1923.

warren stares- \VILLLAM T. PRICE, OF IEAS'JZON, PENNSYLVANIA, ASSIGNOB TO PRICE ENGINE CORPORATION, A-GOBPORATION OF NEW YORK.

MAIN BEARING.

Application filed August 7, 1920. Serial No. 401,850.

tively withstand the vertical forces due to the weights of the rotating parts, and the horizontal forces due to the pressure of the working fluid and the inertia ofthe'reciprocatory' masses. My bearing is adjustable approximately in the direction of the wear resulting from the combined action of the said forces, and is extremely rigid in the direction of the working force, sothat there willbe little if any tendency of the working force to introduce fiexure or deflection into the frame or to distort the bearing surfaces.

Another object of the invention is to form a'two part bearing having the top of the cap substantially in line with the top of the engine frame in order to make a continuous tight joint for an enclosing crank case cover, and astill further object is to provide a .main bearing cap which is held tightly and,

rigidly in place, yet maybe easily removed.

To all of these ends the invention is shown in oneof its preferred forms in the accompanying drawings, in which- Figure 1 is a vertical sectional view 40 through the main bearing on the line 11 of Figure 2 looking in the direction of the arrows, but with the crank shaft removed.

Figure 2 is a vertical sectional view on the line 22 ofFigure 1 looking in the direction of the arrows with the crank shaft in position, and

Figure 3 is a diagrammatic side elevation of the bearing showing the cap in process of removal.

Referring to the drawings, A. represents a portion of the frame of a horizontal single acting engine and B represents a ,port1on of the end of the cylinder which in this instance is integral withthe frame.- C represents the crank shaft having the crank D'and crank pin E and F represents the fly wheel.

In this instance, the frame A is boredat G to receive the'lower main bearing shell H which, with its bab-bitt lining J forms the lower part of the main bearing. As shown, the frame has an opening slotted at an angle. to the vertical to permitthe shaft 0 to be lowered into the bearing and to receive an upper-part or cap K adapted to slide within said slotted opening. The side walls of the slotted portion of the frame are parallel to each other and are in this instance provided with recesses L and 0 across both their faces preferably of a depth in the walls of one thirty-second of an inch leaving guiding portions P and Q preferably in the same plane at the top and bottom of one side and guiding portions R and, S preferably in the same plane at the top and bottom of the other side, so that the upper part or cap having parallel sides, preferably plane surfaces, is guided and fitted tightly'sidewise in the bearing. tions are preferably short to facilitate easy removal of the cap as will hereinafter appear. The slotted opening is preferably machined to the exact widthof the cap oreven a few thousandths of an inch narrower than the cap so that when the cap. is forced-to its position there is an initial stress in the frame I tending to grip the cap tightly sidewise.

The top T of the upper part K,--machined in this instance, is adapted to lie parallel with but slightly below the top U lof the engine frame. also preferably machined.

ln order to hold the cap K tightly sidewise in the slot, against theefl'ect of the working forces, one or more tie members are provlded in theforin of tie bolts W passing through the cap and adapted to hold the sides of the slotted portion of the bearing tightly against the cap at all times. One or more cap bolts X'are also provided for holding the cap downward in the slotrand resisting whatever working forces may tend to raise it and also in this instance they have the further function of retaining the lower main bearing shell in its angular position and tightly against the bored surface of the frame.

Shims a are preferably arranged between the main bearing shellH and the cap K to The bottom guiding por-.

retain the desired clearance between the journal and the bearing and filling material, which may be in the form of felt b is packed between the shims and the sides of the slot, since it is desirable that the shims do not project over the outer edges of the said shell and since in this instance it is desirable to prevent the surging of air from the front of the engine piston through the parting of the bearing. In some instances the shims may be omitted and the dampening function of the sidewalls of the slotted opening depended upon to hold the cap rigidly in place, in which case the filling material maybe eX- tended over the entire parting and the shell would either be held in position by a dowel or other accepted device, or the shell could be omitted and the babbitt lining cast in the body of the bearing.

The upper part or cap is adjusted in position in the bearing with the top T lying parallel with, but slightly below the top U of the engine frame, and a filling piece 0 in this instance of soft packing material, is preferably inserted between the crank case cover (Z and the cap in order to close the opening between the crank case cover and the top of the cap and form a tight joint, even when on account of wear the shims have been removed and the cap lowered.

The cap K is held tightly and rigidly in place on account of the initial stress above referred to but may be easily removed because the clearances L and O in the sides of the slotted portion of the frame are adapted to free the cap K from the parallel guiding portions P and Q and R and S when the cap has been raised a fraction of the depth of the slot by a jacking screw, lever or other accepted device, which permits it to tip in the slot as indicated in Figure 3 so that it may be easily withdrawn. If desired, the clearance O in the short side could be omitted, but is preferably provided.

The bearing is oiled in any suitable manner as by means of the pipe e communicating with the oil passage f leading to the bearing.

I claim:

1. A main bearing comprising an engine frame having a slot therein the longitudinal axis of which is oblique to the vertical and in substantially the line of bearing wear, a bearing part in the closed end of said slot, a cap having a part adapted for insertion into the open end of said slot, having side surfaces fitting corresponding surfaces of said slot and a bearing part. co-acting with said first bearing part, means for relatively adjusting said bearing parts lengthwise of the slot and for binding them securely in place, and means acting crosswise of the slot for binding said corresponding surfaces of said slot and cap together, said means being dis tinct from each other and separately 0perable at different times into definite final positions.

2. A main bearing comprising an engine frame having a slot therein the longitudinal axis of which is oblique to the vertical and in substantially the line of bearing wear, a bearing part. in the closed end of said slot, a cap having a part adapted for insertion into the open end of said slot, having side surfaces fitting corresponding surfaces of said slot and a bearing part co-acting with said first bearing part, lengthwise and crosswise tie bolts for binding said. bearing parts securely but adjustably in place, the former extending substantially in the direction of bearing wear and the latter in the direction of the working force.

3. A main bearing comprising a slotted engine frame, a bearing part in the closed end of said slot, a second bearing part adapted to cooperate with the first and movable in said slot, means acting lengthwise of the slot for adjusting and binding said bearing parts together, and means acting cross-- wise of the slot for binding the second bearing part therein, said means being distinct from each other and separately operable at different times into definite final positions.

4. A slotted frame having a bearing surface at its closed end, a part movable in said slot and having a bearing surface cooperating with the bearing surface at the closed end of the slot, lengthwise tie bolts engagingthe slotted frame and said movable part to adjust and fix the latter relative to the former, and crosswise tie bolts clamping the slotted frame and the movable bearing part together.

5. A main bearing comprising a lower part slotted in line with the axis of said bearing at an angle to the vertical and fitted to receive an upper part and recesses in the sides of said slot adapted to free said upper part when it has been raised a fraction of the depth of said slot.

6. A main bearing comprising a lower part slotted in line with the axis of said hearing at an angle to the vertical and fitted to receive an upper part, recesses in the sides of said slot adapted to free said upper part when it has been raised a fraction of the depth of said slot, and a tie member for drawing the sides of the slot together to clamp said upper part.

7. A main bearing comprising a lower part slotted in line with the axis of said bearing at an angle to the vertical and fitted to receive an upper part, recesses in the sides of said slot adapted to free said upper part when it has been raised a fraction of the depth of said slot, a tie member for drawing the sides of the slot together to clamp said upper part, and means for holding said upper part downward in said slot.

8. A main bearing for an engine comprising a lower part opening upwardly at an angle, the walls of said opening being parallel and recessed, and having guiding portions at both sides at top and bottom, and an upper part adapted .to slide within the said opening, the recesses being adapted to free the upper part from the parallel guiding portions when said upper part has been raised a fraction of the depth of the slot,

thereby the slot. I

9. A main bearing comprising an engine frame slotted at an angle to receive a main bearing cap and bored to receive a bottom half main bearing shell, a main bearing cap fitting in said slot with the top parallel with the top of the frame, means for holding said end cap downward in said slot, a tie member above the journal of said bearingadapted to hold the cap tightly sidewise in said slot, and recesses in the sides of said slot adapted to free said cap when it has been raised a fraction of the depth of said slot.

10. A main bearing comprising an engine frame slotted at an angle to receive a main bearing cap and bored to receive a bottom half main bearing shell, a main bearing cap fitting in said slot with the top parallel with the top of the frame, means for holding said end cap downward in said slot, at least one permitting the upper part to tip in horizontal tie bolt above the journal of said for an engine, comdepth of] f prisingan engine frame slotted at an angle to permit the shaft to be lowered into the bearing, an upper part having itssides fitted to the sides of said slot, the top of said upper part being adapted to lie parallelwith,; but slightly below the top of said engine frame, a cover adapted to make a tight joint with the topof said frame and a filling piece for closing the opening between the cover and 'thetop of said upper part.

12. A main bearing comprising a lower part slotted in line with the axis of said bearing at an angle to the vertical and fitted to receive an .upper part, said slot having one side longer than the other, and a recess in said longer side adapted to free saidupper part when it has been raised a fraction of the depth ofsaid slot.

In testimony whereof, I have signed this specification.

- WILLIAM T. PRICE. 

